question Re: Using put Email processor in NiFI java.lang.NullPointerException: java.lang.NullPointerException in Support Questions

Using put Email processor in NiFI java.lang.NullPointerException: java.lang.NullPointerException

Lorenzo — Tue, 21 Apr 2026 06:29:12 GMT

Hi all,

I am trying to integrate sending emails from NiFi using the put email processor. Below is my configuration:

When I start the processor I get this error:

Failed to properly initialize Processor. If still scheduled to run, NiFi will attempt to initialize and run the Processor again after the 'Administrative Yield Duration' has elapsed. Failure is due to java.lang.NullPointerException: java.lang.NullPointerException

Do you have any advice regarding the configuration?

Thanks

Re: Using put Email processor in NiFI java.lang.NullPointerException: java.lang.NullPointerException

MattWho — Mon, 01 Jul 2024 17:00:00 GMT

@Lorenzo

There is not enough information provided to provide a good response here.

1. Providing the full stack trace output from the nifi-app.log may provide details that are helpful here (challenging considering the NPE nature of the exception)
2. Are you sure the SMTP server supports username and password authentication and not OAuth2 based authentication instead? PutEmail Additional Details

Please help our community grow. If you found any of the suggestions/solutions provided helped you with solving your issue or answering your question, please take a moment to login and click "Accept as Solution" on one or more of them that helped.

Thank you,
Matt

Re: Using put Email processor in NiFI java.lang.NullPointerException: java.lang.NullPointerException

DianaTorres — Fri, 05 Jul 2024 12:57:30 GMT

@Lorenzo Has the reply helped resolve your issue? If so, please mark the appropriate reply as the solution, as it will make it easier for others to find the answer in the future. Thanks.

Re: Using put Email processor in NiFI java.lang.NullPointerException: java.lang.NullPointerException

Lorenzo — Thu, 22 Aug 2024 09:15:40 GMT

Hi all,

I solved sending emails using this configuration:

Lorenzo